| Gudmundr vs Jin | 28–10 | 73.68% |
| Gudmundr vs Kazuya | 16–22 | 42.11% |
| Gudmundr vs Bryan | 20–17 | 54.05% |
| Gudmundr vs Clive | 18–15 | 54.55% |
| Gudmundr vs Dragunov | 13–12 | 52.00% |
| Gudmundr vs Jun | 14–11 | 56.00% |
| Gudmundr vs King | 20–4 | 83.33% |
| Gudmundr vs Steve | 9–13 | 40.91% |
| Gudmundr vs Reina | 9–10 | 47.37% |
| Gudmundr vs Hwoarang | 11–5 | 68.75% |
| Gudmundr vs Lee | 9–4 | 69.23% |
| Gudmundr vs Heihachi | 6–7 | 46.15% |
| Gudmundr vs Law | 5–7 | 41.67% |
| Gudmundr vs Lars | 7–5 | 58.33% |
| Gudmundr vs Victor | 9–3 | 75.00% |
| Gudmundr vs Leo | 6–5 | 54.55% |
| Gudmundr vs Yoshimitsu | 7–3 | 70.00% |
| Gudmundr vs Lili | 6–4 | 60.00% |
| Gudmundr vs Alisa | 6–4 | 60.00% |
| Gudmundr vs Xiaoyu | 3–6 | 33.33% |
| Gudmundr vs Asuka | 5–4 | 55.56% |
| Gudmundr vs Nina | 7–2 | 77.78% |
| Gudmundr vs Lidia | 6–3 | 66.67% |
| Gudmundr vs Paul | 2–5 | 28.57% |
| Gudmundr vs Jack-8 | 4–3 | 57.14% |
| Gudmundr vs Claudio | 1–6 | 14.29% |
| Gudmundr vs Shaheen | 6–1 | 85.71% |
| Gudmundr vs Eddy | 1–4 | 20.00% |
| Gudmundr vs Devil Jin | 4–0 | 100.00% |
| Gudmundr vs Feng | 2–2 | 50.00% |
| Gudmundr vs Zafina | 4–0 | 100.00% |
| Gudmundr vs Leroy | 3–1 | 75.00% |
| Gudmundr vs Kuma | 2–1 | 66.67% |
| Gudmundr vs Panda | 0–2 | 0.00% |
| Gudmundr vs Azucena | 2–0 | 100.00% |
| Gudmundr vs Raven | 2–0 | 100.00% |
| Gudmundr vs Anna | 2–0 | 100.00% |
Limitations
This data is often requested to give insight into which characters you have more trouble with than others, but it is not particularly helpful for that. The main issue is that it is heavily skewed by how strong the opponents you play are.
For example, this data suggests my worst matchup is clearly vs Reina, but that's just because most of those games are vs Yagami.
There is a way to account for this being worked on. The central idea is to assign each matchup a rating vs you which adjusts based on the result, much like the regular rating but also based on the rating of each player. With this, it would give a better summary of how well you perform vs each character.
In the meantime, this page is here to present the data as requested.